Bumper



March 12, 1929. w, F, WILLIAMS 1,704,995

BUMPER Filed April 26. 1928 j, W. JTWM z-rap/vfr Patented Mar. 12, 1929.

I UNITEDSTATQES earner omen.

WILLIAM F. WILLIAMS, or CHICAGO, rumors.

' BUMPER.

Application filed April 26, 1928; Serial Ne. 272,974.

This invention relates to improvements in bumpers for vehicles and more particularly to automobile bumpers. One object to provide a bumper of moderatesize and maximum resiliency having, therefore, maximum shock absorbing qualities, A further object is to provide a bumper provided with tension adjusting means. A further object is to provide a bumper adapted, upon receiving an impact, for movement either laterally or rearwardly or both laterally and rearwardly or for movement laterally at one end'in one direction and then rearwardly I and then laterally in the opposite direction and rearwardly. During all of these move ments the impact or shock being lessened in severity with the result that the damaging possibilities, of the blow are materially lessened' and the force of the blow spent or absorbed before actual contact with vulnerable portions of the vehicles are encountered.

More specifically the invention consists in the combination and arrangement of parts to be hereinafter fully described, pointed out in the claims and illustrated in the accompanying drawing which forms a part of this application for patent and in WlHCh Fig. '1 is a top plan view of the bumper with a portion of the buffer bar and springs eliminated. r

Fig. 2 is an end view taken on line 22 of Fig. l.

Fig. 3 .is an enlarged fragmentary sectional view taken on line of Fig. 2.

Fig. l is a cross sectional View taken on line 4:lof Fig. 1.

Like reference characters denote corre sponding parts throughout the several views.

The present inventionicomprises a buffer bar engaged and supported adjacent each end by two pairs of pivotally connected arcuate links which links are pivotally sup ported by a pair of bearing blocks connected by brackets to the vehicle or to the springs thereof, said. sets of links being connected together by a plurality of springs.

The reference numerals 1, 2 denote a pair of-brackets connected directly to the vehicle body, or to the springs thereof, and having secured thereto the plates or flanges 3, i of the cylindrical bearing blocks 5, 6 through the longitudinal center of each of which a pin 7 extends, the pin 7 of the'block 5 pivotally connecting a pair of arcuate links 8 to the ends of said block, the ends of said links 8, remote from saidlblock being pivotally "ino erative aosition ,b the s rin 's.

connected by another pin 9 to a second pair of arcuate links 10 pivotally connected by bolt 11 to the boss 12 formed upon the buffer bar 13. Q

The pin 7 of block 6 connects a pair of arcuate links 8 to said block whilea pin 9' connects said links.8'to-the links 10 which at their opposite ends are pivotally connected by bolt 11 to boss-1 1 of butter bar 13. The links 8, 7 I respects to the links 8, 10 except that they arecurved in opposite directions and so made rights lefts. Each block 5 and'tis PYOVlflGtl with a stop pin 15 for the pair of links connected thereto. a

Coil springs 16 and 17 connect the pins 9 and 9 at opposite ends of said pins. The inner ends of the iinksMlO. areconnected together by the post 18 and the inner ends of the links 10 by a similar post 19, said posts beingformed respectively with transverse threaded perforations to receive the threaded adjustment boltsQO, 21, the inner ends of which are connected by the spring 22, each post having a span link 23 adapted to bear against the meeting ends of two pairs of links and each bolt being provided with i the adjusting nuts 24:. 1

By adjusting the bolts 20, 21 relative to each other the distance between their inner ends is varied, the spring'22 expanded more.

or less and the pressure of the span links 23 against the arcuate links varied. f

When a blow is delivered against the'buffer bar 13 it will most likely force one end thereof inwardly, while the bar moves inwardly and laterally. until the set of links connected thereto ride against the bar. A

further,v movement of the buffer bar will 10 similar in all spreads the bolts 9; 9 apart but when pres- I sure against the buffer bar is relieved the springs Wlll draw said bolts toward'each other again thus moving the sets of links to normal position again, shown inFig. 1, and

again thrusting the buffer baroutward.

The stop pins 15 prevent the links 8 and 8- from being drawn toward eachother into movement ofthe buffer bar inwardly causes the sets of arcuate links atone side or at both sides of the bar to bow or fold together mechanism connectin about the bolts 9 or 9 or both. This movement causes the sets of links 8 or 8 at their inner ends to ride out against the bar or bars 23 and force them outwardly against the tension of the springs thus causing the buffer to yieldingly resist the force of the impact and so cushioning the blow.

' What is claimed is v 1. In a bumper, a butter bar, bearing blocks, sets of arcnate links at each end of said bufi'erbar pivotally connected together and adjustably connecting said heifer bar to said bearing blocks, springs connecting the common pivot pin of the sets of links at one end to the commonipivot pin of the sets of links at the opposite end oisaid buffer bar, stop pins for said areuate links carried by saidbearing blocks and tension adjusting g said sets of arcuate links.

2 Ina bumper, a buffer bar, bearing locks, sets of areuate links at each end of said buffer bar pivotally connected" together and adjustably connecting said butter bar to said bearing blocks, the sets of arcuate links at opposite ends-0f said bulier bar bemg curved 111 opposite directions, sprlngs connecting the common pivot pin of the sets of links at one end to the common pivot pm of the sets of links at the opposlte end of said butler bar, stop pins for said arcuate links carried by said bearing blocks, and $935101 adjusting mechanism connecting said sets of arcuate links.

3. In a bumper, a butler bar said bniler bar pivotally connected together and ad ust-ably connecting said buffer bar to said bearing); 'blocks,-snr1ngs connecting the common pivot pin oi the se ts of links at one posts, a link carried by each threaded bolt for engagement With the inner ends of said arcuate links, nuts for said threaded bolts, and a spring connecting the inner ends of said threaded bolts.

In testimony that I claim the foregoing as my own I have hereto affixed mysignature;

IVILLIAM F. IVILLIAMS.

bearing blocks, sets of arcnate links at each end oi 

